Takaisin Tulosta

Strategies for communicating contraceptive effectiveness

Evidence summaries

Level of evidence: D

Audiovisual aids or clear categories of risks might possibly be more effective in communicating contraceptive effectiveness compared with oral presentations or numbers, although the evidence is limited.

A Cochrane review «»1 «Lopez LM, Steiner MJ, Grimes DA, Schulz KF. Strate...»1 included 7 studies with a total of 4 526 subjects. Two trials provided multiple sessions for participants. Five trials provided one session and focused on testing educational material or media. In one study, knowledge gain favored a slide-and-sound presentation compared with a physician's oral presentation (WMD -19.00; 95% CI -27.52 to -10.48, n=100). In another study (n=461), a table with effectiveness categories led to more correct answers than one based on numbers [ORs were 2.42 (95% CI 1.43 to 4.12) and 2.19 (95% CI 1.21 to 3.97)] or a table with categories and numbers [ORs were 2.58 (95% CI 1.5 to 4.42) and 2.03 (95% CI 1.13 to 3.64)]. One trial examined contraceptive choice: women in the expanded program were more likely to choose sterilization (OR 4.26; 95% CI 2.46 to 7.37) or use a modern contraceptive method (OR 2.35; 95% CI 1.82 to 3.03). No trial had an explicit theoretical base, but each used concepts from common theories or models.

Comment: The quality of evidence is downgraded by study quality (several limitations), by indirectness (differences in studied interventions and outcomes), by imprecise results (limited study size for each comparison).


  1. Lopez LM, Steiner MJ, Grimes DA, Schulz KF. Strategies for communicating contraceptive effectiveness. Cochrane Database Syst Rev 2008;(2):CD006964 [Review content assessed as up-to-date: 13 February 2013]. «PMID: 18425974»PubMed